This is a bit troubling. We have custom widgets and themes that we help develop for clients that, for one reason or another, remain on a specific version of Web AppBuilder. With the ability to download previous versions removed, we are scrambling to try and find copies of older downloads in order to perform new setups.
I understand providing the most recent version by default, but to have totally removed the ability to get an older version is not helpful. The old download page that allowed up to selects a version for download was a really nice feature, IMO.